Question

dada as funçoes f(x)=2x-3 e g(x)4-x,determine:
a) f(-1) b) f(x+1) c) g(4) d) g(x-2)

Answer 1

$f(x)=2x-3 \\ g(x)=4-x \\ \\ a)f(-1)=2(-1)-3 \\ f(-1)=-2-3 \\ f(-1)=-5 \\ \\ f(x+1)= 2(x+1)-3= \\ f(x+1)=2x+2-3 \\ f(x+1)=2x-1 \\ \\ g(4)=4-(4) \\ g(4)=0 \\ \\ g(x-2)=4-(x-2) \\ g(x-2)=4-x-2 \\ g(x-2)=2-x$